Centrifugal dust arrester



l Jan. 14, 1930. F. H. WAGNER 1,743,171

CENTRIFUGAL DUST ARRESTER Filed April 25, 1929 2 Sheets-Sheet l y WY Jan. 14, V1930. F. H. WAGNER CENTRIFUGAL DUST ARRESTER Filed April 25, 1929 2 Sheets-Sheet 2 ure 2; v

Patented Jan. 1,4, 1930 UNITEDA STATES PATENT oFFicE y FREDERICK H. WAGNER, OF BALTIMORE, MARYLAND, ASSIGNOR T0 THE BARTLETT HAYWARD COMPANY, 0F BALTIMORE, MARYLAND, A vCORPORATION' 0F MARYLAND CENTRIFUGAL DU-ST ARRESTER Application led April 25, 1929. Serial No. 368,068.

My invention relates to dust arresters of the centrifugal type such as are commonly yemployed in removing dust from air or gas.

Among the objects of my invention are the provision of an arrester which 'will function -more eiiectively than the devices of the prior art, and one which will operate with very small expenditure of power.

l Other objects of `my .invention will appear from the following description when read in connectionl with the accompanying drawings,

in lwhich c Figure 1 is a. vertical sectional view of one form of arrester' embodying my invention,

15 parts being broken away to show the interior structure; p l

Figure 2 is asectional view showing further details of the interior structure;

lFigure 3 is a section on line 3-.'3 of Fig- Figure ure 2;v v

Figure 5 is a section on line 5-5 of Fig. 2; and

25 Figure 6 is a sectional view on line 6-6 of Fig. 3. y l The device as shown in Figure 1 comprises an upright cylindrical l casing 7 partially closed at the top by a flaring cap 8 which merges into an outlet tube 9. i The bottom of Ithe casingis formed as a hopper 10 and 1s closed bya conical closure 11 attached to an arm` 12. This arm is pivoted on. a bracket 13 and the closure is normally biased to closed osition by an adjustable weight 14. The hopper 10 forms a dust collecting receptacle from Iwhich the dust may be removedby openin the closure 11.

Suita ly secured within and nearthe top of casing 7 is a fiat plate 15 carrying suspended therefrom a cylindrical tube 16. T-.his tube is disposed centrally within the casing 7 and serves as a support for a coiled tube 17. As here shown this tube comprises flat top and bottom walls 18 and 19, respectively, and its inner wall is formed by the tube 16. The outer wall of tube 17 contains a series of vertical louver elements 20 spaced apart to provide exit openings from the interior of the tube,

as best shown in Figures 3 and 4. The top 4 islasectionon line 4-4 of Figwall 18 extends' outwardly and supports from its. outer ed 'e a coiled apron 21, this apron being space from the tube a short distance and being in substantial concentric relation thereto.

The apron 21 contains a series of vertical openings 22 which are in substantial alignnient with the louvers 20 in the peripheral surface of tube 17. It will be noted from an that gas entering lthe tube 17 passes in a horizontal direction and thence upwardly in a spiral path through this tube toward an exit 26 provided in the plate 15, and with which the extreme upper end of tube 17 connects. As the gas passes through this tube, the 'parposed in substantially a orizontal plane so ticles of dust are acted upon by centrifugal A force and are thrown outwardly so as to pass through the louvers 20 and out into the space: between these louvers and the apron 21.. Upon entering'this space, however, the particles Y encounter the delecting bailles 24 which direct them either downwardly, so that they rea'ch the dead space outside of apron'21, or 'pass through the openings 22 in this apron, from whence they fall bygravity into the' hopper 10. The gas passes spirally upward throughexit opening 26 andthence to tube 9.'

In order to prevent dust from collecting on the to wall 18ct the inlet tube after its as-` sage tliirough the louvers'20, I provide a coiled inclined skirt 27 which is disposed beneath the louvers 20 and baiiles 24. This skirt flares outwardly and is co-extensive lwith lthe bottom wall 19 offtube 17 Due to this structure `any dust thrown out through louvers 20 and not having suilicient velocity to be carried p through the openings 22 in the apron 21, will fall downwardly and be deiected by the 'skirt 27, from whence it will reach the dead space in casing 7 and fall to hopper 10 where it collects.

Dust arresters constructed in accordance with my invention are particularly eective in that they contain no abrupt turns to obstruct the flow of air or gas, and yet are capable of removing practically all of the dust from heavily laden gas by `a Single traverse. The perforated apron 21 prevents dust from being aspirated back into tube 17, after it has been thrown out into the dead space in cas in(r 7.

l'have shown the tube 17 as made up of approximately two and one-half convolutions, but it will be clear to those skilled in the art that my invention is not limited to this number of turns, noris it limited to the use of a'coiled tube having a rectangular cross section as shown, because other cro'ss sections are equally suitable.

Although I have herein shown only one form of centrifugal dust arrester embodying my invention, it will be obvious that various modifications may be made within the scope of the appended claims without departing from the spirit and scope of my invention.

What is claimed is:

' l. A dust arrester comprising anupright casing; a coiled tube mounted within and lengthwise of said casing, said tube having openings in its peripheral surface; and a coiled skirt disposed in inclined spaced relation to said tube beneath said openings.

2. A dust arrester comprising a hollow upright casing; a coiled tube disposed within said casing and lengthwise thereof, said tube having a series of louvers in its peripheral surface; and an inclined coiled skirt disposed beneath said louvers and in spaced relation thereto.

3. A dust arrester comprising a hollow upright casing; a coiled tube disposed within said casing, said tube having a plurality of openings in itsv peripheral surface; a perforated apronv extending in approximately parallelrelation to the peripheral surface of said tube; and a coiled skirt disposed beneath said tube and apron, and in inclined relation thereto.

4. A dust arrester comprising an upright casing; a coiled tube arranged to form a tortuous passageway lengthwise of said casing, said tube having louvers in its peripheral surface; a coiled apron extending in approximately parallell relation `to the peripheral surface of said-tube, and having openings therethrough; a series ofballies on the interior of said apron; and a spiral skirt disposed beneath said tube and apron and inclined with respect thereto.

5. A centrifugal' dust arrester comprising an upright coiled tube having an inlet at the bottom and openings in its peripheral sur, face; a coiled apron concentric with said tube and having openings therein; an inclined spiralskirt disposed beneath said tube and apron; and an `upright casing enclosing all of said parts and providing a dust-receiving chamber outside of said apron.

6. A centrifugal dust arrester comprising an upright casing having a dust receiving space near its bottom end; a coiled tube disposed lengthwise within said casing and pro vided with a gas inlet near the bottom, and a gas outlet near the top, said tube having louvers in its peripheral surface; a coiled apron mounted in parallel spaced relation to said tube, and having openings therethrough; a series of upright baffles disposed on the interior of said apron for deflecting dust through the openings in said apron; and a downward'- ly inclined spiral skirt mounted below said tube and apron for deliecting dust into said casing.

7. A centrifugal dust arrester comprising an upright casing; a coiled tube mounted within and lengthwise of said casing, and having a series of openings in its peripheral surface; a coiled apron disposed outside of said tube and having openings in approximate alignment with the openings in said v tube: and a series of upright baffles inside of said apron and extending substantially to the i peripheral surface ofsaid tube for dellecting dust from said tube through the openings in said apron.

8. A dust arrester comprising an upright .lip on said apron depending below said tube;

and means for discharging dust collected in said casing.

9. A centrifugal dust arrester comprising an upright casing with a dust discharging opening at the bottom ;"a spiral tube disposed 1n said casing and comprising a plurality of convolutions having louvers in the peripheral wall; a spiral apron disposed outside of said tube throughout its extent and having openings in it; and an inclined spiral skirt mounted below the louvers in said tube for deflecting dust into said casing.

In testimony whereofl I have signed my name to this specifica-tion.

FREDERICK H. WAGNER. 

